Simon wrote on Facebook that another Texas congressman informed her that a fellow member of the delegation was in her seat — and “regularly does this” to passengers.

United claims Simon lost her seat because she canceled her flight via the app — which she denies. And Jackson Lee inflamed matters by attributing Simon’s discontent to racial animus.

For now, Simon is focusing most of her energy on dealing with United, not Jackson Lee, but told Fox News: “The only way she is relevant is that she has a documented history of demanding first-class service.”

Asked for comment, Jackson Lee spokesman Rucks Russell said in a statement: “The congresswoman regrets any inconvenience that her travel may have caused to any passenger, however the issue in question involves the passenger and United Airlines.”